What happens during carbon fixation during photosynthesis?

1 answer:

7 0

Photosynthesis, is another form of carbon fixation that can take place in the absence of sunlight. The Calvin cycle has two parts. First carbon dioxide is ‘‘fixed’’. Then ATP and NADPH from the light reactions provide energy to combine the fixed carbons to make sugar. Animals and other organisms cannot take in CO2 directly. They have to eat other organisms or absorb other organic molecules in order to get the Carbon that you need. Autotrophs can build low-energy inorganic CO2 into high-energy organic molecules like glucose. Autotrophs are an organism that is capable of synthesizing its own food from inorganic substances using light or chemical energy such as green plants, algae and other bacteria. carbon fixation is the first step of a cycle

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2. How many grams of zinc will be formed if 32.0 g of copper reacts with zinc nitrate? Copper(I)nitrate is the other product.

Yakvenalex [24]

Answer:

16.46 g.

Explanation:

It is a stichiometry problem.

We should write the balance equation of the mentioned chemical reaction:

2Cu + Zn(NO₃)₂ → Zn + 2Cu(NO₃).

It is clear that 2.0 moles of Cu reacts with 1.0 mole of Zn(NO₃)₂ to produce 1.0 mole of Zn and 2.0 moles of Cu(NO₃).

We need to calculate the number of moles of the reacted Cu (32.0 g) using the relation:

n = mass / molar mass

The no. of moles of Cu = mass / atomic mass = (32.0 g) / (63.546 g/mol) = 0.503 mol.

Using cross multiplication:

2.0 moles of Cu produces → 1.0 mole of Zn, from the stichiometry.

0.503 mole of Cu produces → ??? mole of Zn.

The no. of moles of Zn produced = (1.0 mol)(0.503 mol) / (2.0 mol) = 0.2517 mol.

∴ The grams of Zn produced = no. of moles x atomic mass of Zn = (0.2517 mol)(65.38 g/mol) = 16.46 g.

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3 years ago

Calculate the frequency of electromagnetic wave with the wave length 344nm ( hint: use dimensional analysis)

Svetlanka [38]

Frequency = speed of light
---------------------------
wavelength

= 3 x 10^8
------------------------
344 x 10^-9

= 8.72 x 10^14 Hz.

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Based on these ideas, what are the pro's and con's for both Sexual Reproduction and Asexual reproduction?

Svetradugi [14.3K]

Asexual
Pro:
1. inexpensive to make offspring (usually make a lot at a time and not invest a lot of time in raising them).
2. Do not need a mate to reproduce.
3. Can rapidly expand a population
Con:
1. genetically identical- prone to extinction because once a parasite has evolved to attack a specific genotype, it can kill them all.
2. Lineages usually don't last longer than a couple thousand years

Sexual:
Pros:
1. Genetically unique- so more likely to create a "successful" offspring
2. Lineages more likely to last hundreds of thousands of years

Cons:
1. More effort into creating offspring- require more parental effort
2. STD's- easily to pass
3. need to find a mate or else won't be successful as an organism.

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3 years ago

A negative △H means an exothermic reaction. True False

Nostrana [21]

Your answer is False I think

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